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AssigneeNippon Kokan Kabushiki Kaisha
InventorsTomihiro Hara, Takeshi Adaniya, Masaaki Yamashita, Akira Enatsu
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The present invention relates to a process for the preparation of a highly anticorrosive surface-treated steel plate. This process comprises the steps of subjecting a surface of a steel plate having a plating layer of the zinc or aluminum type deposited thereon to a chromate treatment to form a chromate film, treating the steel plate with an organic composite silica solution comprising an epoxy resin in an amount exceeding a certain level as an indispensable component and a curing agent optionally incorporated therein to form an organic composite silicate film comprising colloidal silica, organic resin and silane formed on the chromate film, and heat-treating the steel plate at a specific temperature.
A process for the preparation of a highly anticorrosive surface-treated steel plate, which comprises subjecting a plated surface of a steel plate having a plating layer of the zinc or aluminum type to the following treatments:
A process for the preparation of a highly anticorrosive surface-treated steel plate, which comprises subjecting a plated surface of a steel plate having a plating layer of the zinc type or aluminum type to the following treatments:
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